Cutting by use of rotating axially moving tool – Processes – Bit detachable
Reexamination Certificate
2005-08-12
2008-07-01
Bryant, David P. (Department: 3726)
Cutting by use of rotating axially moving tool
Processes
Bit detachable
C408S059000, C408S200000, C408S229000, C408S231000, C408S233000, C408S705000, C408S713000
Reexamination Certificate
active
07393162
ABSTRACT:
A gun-drill comprises a cutting-head detachably secured to a shank, having a common longitudinal axis and comprising mating peripheral surfaces. A shank coupling portion comprises a forwardly tapering shank fixation surface is formed at a front end of the shank, and a cutting-head coupling portion comprising a forwardly tapering cutting-head fixation surface is formed at a rear end of the cutting-head. Both the shank and the cutting-head coupling portion extend over a peripheral coupling angle φ of more than 180°. The shank and the cutting-head are assembled by positioning the cutting-head leading face in front of the shank trailing face, slidably inserting the cutting-head coupling portion into the shank coupling portion laterally to the axis of rotation A and rotating the cutting-head relative to the shank in a direction opposed to the direction of rotation R so that the cutting-head coupling portion and the shank coupling portion interlock co-axially.
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Bryant David P.
Carlyle Womble
Iscar Ltd.
Talbot Michael W
LandOfFree
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